Nothing to worry about, this can be quite normal.
In fact I stuck in some prunings alongside my bushes to increase my stock and even they have budded.
What you have to worry about is if they turn to 'big bud'
It seems to be a funny season this year!
I am expecting a delivery of raspberry canes and have just had an e-mail to tell me delivery will be late because the new stock isn't dormant yet, so until that happens they will not lift them.
So put it down to the mild autumn!